[RFC,v1,3/6] drm/tegra: Avoid implicit DMA backing with IOMMU

Commit Message

Dmitry Osipenko July 26, 2018, 11:16 p.m. UTC

Tegra DRM manages IOMMU by itself, backing DMA with IOMMU by the drivers
core breaks the Tegra driver.

Signed-off-by: Dmitry Osipenko <[e-mail]>
---
 drivers/gpu/drm/tegra/dc.c   | 1 +
 drivers/gpu/drm/tegra/gr2d.c | 1 +
 drivers/gpu/drm/tegra/gr3d.c | 1 +
 drivers/gpu/drm/tegra/vic.c  | 1 +
 4 files changed, 4 insertions(+)

Patch

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index eb9bb83f8f5d..4827770939e3 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -2675,6 +2675,7 @@  static const struct dev_pm_ops tegra_dc_pm_ops = {
 struct platform_driver tegra_dc_driver = {
 	.driver = {
 		.name = "tegra-dc",
+		.no_implicit_iommu = true,
 		.of_match_table = tegra_dc_of_match,
 		.pm = &tegra_dc_pm_ops,
 	},
diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c
index 3c5503f1bf3d..e427585ef5cc 100644
--- a/drivers/gpu/drm/tegra/gr2d.c
+++ b/drivers/gpu/drm/tegra/gr2d.c
@@ -327,6 +327,7 @@  static int gr2d_remove(struct platform_device *pdev)
 struct platform_driver tegra_gr2d_driver = {
 	.driver = {
 		.name = "tegra-gr2d",
+		.no_implicit_iommu = true,
 		.of_match_table = gr2d_match,
 	},
 	.probe = gr2d_probe,
diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c
index 651e697ccbba..f54710c36afb 100644
--- a/drivers/gpu/drm/tegra/gr3d.c
+++ b/drivers/gpu/drm/tegra/gr3d.c
@@ -481,6 +481,7 @@  static int gr3d_remove(struct platform_device *pdev)
 struct platform_driver tegra_gr3d_driver = {
 	.driver = {
 		.name = "tegra-gr3d",
+		.no_implicit_iommu = true,
 		.of_match_table = tegra_gr3d_match,
 	},
 	.probe = gr3d_probe,
diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
index 0e6642bb8524..4ecc466ee490 100644
--- a/drivers/gpu/drm/tegra/vic.c
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -402,6 +402,7 @@  static const struct dev_pm_ops vic_pm_ops = {
 struct platform_driver tegra_vic_driver = {
 	.driver = {
 		.name = "tegra-vic",
+		.no_implicit_iommu = true,
 		.of_match_table = vic_match,
 		.pm = &vic_pm_ops
 	},